55540497 has 4 divisors (see below), whose sum is σ = 74054000. Its totient is φ = 37026996.

The previous prime is 55540487. The next prime is 55540519. The reversal of 55540497 is 79404555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55540497 - 2¹² = 55536401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55540427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9256747 + ... + 9256752.

It is an arithmetic number, because the mean of its divisors is an integer number (18513500).

Almost surely, 2^55540497 is an apocalyptic number.

It is an amenable number.

55540497 is a deficient number, since it is larger than the sum of its proper divisors (18513503).

55540497 is a wasteful number, since it uses less digits than its factorization.

55540497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18513502.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 55540497 is about 7452.5496979222. The cubic root of 55540497 is about 381.5369355830.

The spelling of 55540497 in words is "fifty-five million, five hundred forty thousand, four hundred ninety-seven".