55275731 has 8 divisors (see below), whose sum is σ = 66497280. Its totient is φ = 44885448.

The previous prime is 55275719. The next prime is 55275757. The reversal of 55275731 is 13757255.

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

It is not a de Polignac number, because 55275731 - 2¹⁸ = 55013587 is a prime.

It is a super-2 number, since 2×55275731² = 6110812875168722, 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 = 55275691 and 55275700.

It is not an unprimeable number, because it can be changed into a prime (55275331) 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, 207671 + ... + 207936.

It is an arithmetic number, because the mean of its divisors is an integer number (8312160).

Almost surely, 2^55275731 is an apocalyptic number.

55275731 is a deficient number, since it is larger than the sum of its proper divisors (11221549).

55275731 is a wasteful number, since it uses less digits than its factorization.

55275731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415633.

The product of its digits is 36750, while the sum is 35.

The square root of 55275731 is about 7434.7650265493. The cubic root of 55275731 is about 380.9296972582.

The spelling of 55275731 in words is "fifty-five million, two hundred seventy-five thousand, seven hundred thirty-one".