15551015532 has 48 divisors (see below), whose sum is σ = 39985693440. Its totient is φ = 4673648448.

The previous prime is 15551015521. The next prime is 15551015533. The reversal of 15551015532 is 23551015551.

It is a junction number, because it is equal to n+sod(n) for n = 15551015493 and 15551015502.

It is not an unprimeable number, because it can be changed into a prime (15551015533) 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, 1152432 + ... + 1165847.

It is an arithmetic number, because the mean of its divisors is an integer number (833035280).

Almost surely, 2^15551015532 is an apocalyptic number.

15551015532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15551015532 is an abundant number, since it is smaller than the sum of its proper divisors (24434677908).

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

15551015532 is a wasteful number, since it uses less digits than its factorization.

15551015532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318342 (or 2318340 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 15551015532 in words is "fifteen billion, five hundred fifty-one million, fifteen thousand, five hundred thirty-two".