56913551 has 4 divisors (see below), whose sum is σ = 58749504. Its totient is φ = 55077600.

The previous prime is 56913541. The next prime is 56913589. The reversal of 56913551 is 15531965.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56913551 - 2¹⁴ = 56897167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56913541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917930 + ... + 917991.

It is an arithmetic number, because the mean of its divisors is an integer number (14687376).

Almost surely, 2^56913551 is an apocalyptic number.

56913551 is a deficient number, since it is larger than the sum of its proper divisors (1835953).

56913551 is a wasteful number, since it uses less digits than its factorization.

56913551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835952.

The product of its digits is 20250, while the sum is 35.

The square root of 56913551 is about 7544.1070379469. The cubic root of 56913551 is about 384.6554538224.

The spelling of 56913551 in words is "fifty-six million, nine hundred thirteen thousand, five hundred fifty-one".