1555323252 has 24 divisors (see below), whose sum is σ = 4147528896. Its totient is φ = 444378048.

The previous prime is 1555323221. The next prime is 1555323277. The reversal of 1555323252 is 2523235551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9257793 + ... + 9257960.

It is an arithmetic number, because the mean of its divisors is an integer number (172813704).

Almost surely, 2^1555323252 is an apocalyptic number.

1555323252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1555323252 is an abundant number, since it is smaller than the sum of its proper divisors (2592205644).

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

1555323252 is a wasteful number, since it uses less digits than its factorization.

1555323252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18515767 (or 18515765 counting only the distinct ones).

The product of its digits is 45000, while the sum is 33.

The square root of 1555323252 is about 39437.5867922975. The cubic root of 1555323252 is about 1158.6178673277.

The spelling of 1555323252 in words is "one billion, five hundred fifty-five million, three hundred twenty-three thousand, two hundred fifty-two".