1551160521 has 12 divisors (see below), whose sum is σ = 2277296580. Its totient is φ = 1017154080.

The previous prime is 1551160517. The next prime is 1551160553. The reversal of 1551160521 is 1250611551.

1551160521 is a `hidden beast` number, since 1 + 5 + 51 + 1 + 605 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16088121 + 1535072400 = 4011^2 + 39180^2 .

It is not a de Polignac number, because 1551160521 - 2² = 1551160517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551160021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1412166 + ... + 1413263.

It is an arithmetic number, because the mean of its divisors is an integer number (189774715).

Almost surely, 2^1551160521 is an apocalyptic number.

It is an amenable number.

1551160521 is a deficient number, since it is larger than the sum of its proper divisors (726136059).

1551160521 is a wasteful number, since it uses less digits than its factorization.

1551160521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825496 (or 2825493 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 1551160521 is about 39384.7752437411. The cubic root of 1551160521 is about 1157.5832863053.

The spelling of 1551160521 in words is "one billion, five hundred fifty-one million, one hundred sixty thousand, five hundred twenty-one".