56197155 has 64 divisors (see below), whose sum is σ = 114600960. Its totient is φ = 22892544.

The previous prime is 56197151. The next prime is 56197171. The reversal of 56197155 is 55179165.

It is not a de Polignac number, because 56197155 - 2² = 56197151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56197151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33087 + ... + 34743.

It is an arithmetic number, because the mean of its divisors is an integer number (1790640).

Almost surely, 2^56197155 is an apocalyptic number.

56197155 is an abundant number, since it is smaller than the sum of its proper divisors (58403805).

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

56197155 is a wasteful number, since it uses less digits than its factorization.

56197155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 47250, while the sum is 39.

The square root of 56197155 is about 7496.4761721758. The cubic root of 56197155 is about 383.0346915745.

The spelling of 56197155 in words is "fifty-six million, one hundred ninety-seven thousand, one hundred fifty-five".