55437631 has 2 divisors, whose sum is σ = 55437632. Its totient is φ = 55437630.

The previous prime is 55437601. The next prime is 55437637. The reversal of 55437631 is 13673455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55437631 - 2²¹ = 53340479 is a prime.

It is a super-2 number, since 2×55437631² = 6146661861784322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55437637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27718815 + 27718816.

It is an arithmetic number, because the mean of its divisors is an integer number (27718816).

Almost surely, 2^55437631 is an apocalyptic number.

55437631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55437631 is an equidigital number, since it uses as much as digits as its factorization.

55437631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 34.

The square root of 55437631 is about 7445.6451030116. The cubic root of 55437631 is about 381.3012430988.

The spelling of 55437631 in words is "fifty-five million, four hundred thirty-seven thousand, six hundred thirty-one".