55255531 has 8 divisors (see below), whose sum is σ = 55948464. Its totient is φ = 54566400.

The previous prime is 55255517. The next prime is 55255573. The reversal of 55255531 is 13555255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55255531 - 2⁹ = 55255019 is a prime.

It is a super-2 number, since 2×55255531² = 6106347412183922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55255493 and 55255502.

It is not an unprimeable number, because it can be changed into a prime (55253531) 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, 37356 + ... + 38806.

It is an arithmetic number, because the mean of its divisors is an integer number (6993558).

Almost surely, 2^55255531 is an apocalyptic number.

55255531 is a deficient number, since it is larger than the sum of its proper divisors (692933).

55255531 is a wasteful number, since it uses less digits than its factorization.

55255531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901.

The product of its digits is 18750, while the sum is 31.

The square root of 55255531 is about 7433.4064196706. The cubic root of 55255531 is about 380.8832892038.

The spelling of 55255531 in words is "fifty-five million, two hundred fifty-five thousand, five hundred thirty-one".