151220642531 has 16 divisors (see below), whose sum is σ = 174466566144. Its totient is φ = 128385849984.

The previous prime is 151220642491. The next prime is 151220642543. The reversal of 151220642531 is 135246022151.

It is a de Polignac number, because none of the positive numbers 2^k-151220642531 is a prime.

It is a super-2 number, since 2×151220642531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151220612531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6386891 + ... + 6410523.

It is an arithmetic number, because the mean of its divisors is an integer number (10904160384).

Almost surely, 2^151220642531 is an apocalyptic number.

151220642531 is a deficient number, since it is larger than the sum of its proper divisors (23245923613).

151220642531 is a wasteful number, since it uses less digits than its factorization.

151220642531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32290.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 151220642531 its reverse (135246022151), we get a palindrome (286466664682).

The spelling of 151220642531 in words is "one hundred fifty-one billion, two hundred twenty million, six hundred forty-two thousand, five hundred thirty-one".