56201551 has 8 divisors (see below), whose sum is σ = 64867104. Its totient is φ = 47695200.

The previous prime is 56201533. The next prime is 56201573. The reversal of 56201551 is 15510265.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56201551 - 2¹⁹ = 55677263 is a prime.

It is a super-2 number, since 2×56201551² = 6317228669611202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56201521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39040 + ... + 40453.

It is an arithmetic number, because the mean of its divisors is an integer number (8108388).

Almost surely, 2^56201551 is an apocalyptic number.

56201551 is a deficient number, since it is larger than the sum of its proper divisors (8665553).

56201551 is a wasteful number, since it uses less digits than its factorization.

56201551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79601.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 56201551 is about 7496.7693708690. The cubic root of 56201551 is about 383.0446788927.

The spelling of 56201551 in words is "fifty-six million, two hundred one thousand, five hundred fifty-one".