157561140 has 48 divisors (see below), whose sum is σ = 481279680. Its totient is φ = 38196480.

The previous prime is 157561139. The next prime is 157561163. The reversal of 157561140 is 41165751.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 157561098 and 157561107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118705 + ... + 120024.

It is an arithmetic number, because the mean of its divisors is an integer number (10026660).

Almost surely, 2^157561140 is an apocalyptic number.

157561140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157561140 is an abundant number, since it is smaller than the sum of its proper divisors (323718540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157561140 is a wasteful number, since it uses less digits than its factorization.

157561140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238752 (or 238750 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 157561140 is about 12552.3360375669. The cubic root of 157561140 is about 540.1110196977. Note that the first 3 decimals are identical.

The spelling of 157561140 in words is "one hundred fifty-seven million, five hundred sixty-one thousand, one hundred forty".