57002491 has 16 divisors (see below), whose sum is σ = 71011584. Its totient is φ = 44551584.

The previous prime is 57002443. The next prime is 57002501. The reversal of 57002491 is 19420075.

It is a happy number.

It is not a de Polignac number, because 57002491 - 2¹¹ = 57000443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57002291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3780 + ... + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (4438224).

Almost surely, 2^57002491 is an apocalyptic number.

57002491 is a deficient number, since it is larger than the sum of its proper divisors (14009093).

57002491 is a wasteful number, since it uses less digits than its factorization.

57002491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 57002491 is about 7549.9994039735. Note that the first 3 decimals coincide. The cubic root of 57002491 is about 384.8557192544.

The spelling of 57002491 in words is "fifty-seven million, two thousand, four hundred ninety-one".