55263531 has 16 divisors (see below), whose sum is σ = 78089760. Its totient is φ = 34702080.

The previous prime is 55263521. The next prime is 55263539. The reversal of 55263531 is 13536255.

It is not a de Polignac number, because 55263531 - 2¹⁷ = 55132459 is a prime.

It is a super-2 number, since 2×55263531² = 6108115717175922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55263539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4180 + ... + 11313.

It is an arithmetic number, because the mean of its divisors is an integer number (4880610).

Almost surely, 2^55263531 is an apocalyptic number.

55263531 is a deficient number, since it is larger than the sum of its proper divisors (22826229).

55263531 is a wasteful number, since it uses less digits than its factorization.

55263531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15566.

The product of its digits is 13500, while the sum is 30.

The square root of 55263531 is about 7433.9445114959. The cubic root of 55263531 is about 380.9016699837.

Adding to 55263531 its reverse (13536255), we get a palindrome (68799786).

The spelling of 55263531 in words is "fifty-five million, two hundred sixty-three thousand, five hundred thirty-one".