55651511 has 4 divisors (see below), whose sum is σ = 55680312. Its totient is φ = 55622712.

The previous prime is 55651499. The next prime is 55651529. The reversal of 55651511 is 11515655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55651511 - 2²² = 51457207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651571) 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, 11276 + ... + 15441.

It is an arithmetic number, because the mean of its divisors is an integer number (13920078).

Almost surely, 2^55651511 is an apocalyptic number.

55651511 is a deficient number, since it is larger than the sum of its proper divisors (28801).

55651511 is a wasteful number, since it uses less digits than its factorization.

55651511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28800.

The product of its digits is 3750, while the sum is 29.

The square root of 55651511 is about 7459.9940348502. The cubic root of 55651511 is about 381.7909709547.

The spelling of 55651511 in words is "fifty-five million, six hundred fifty-one thousand, five hundred eleven".