55620951 has 4 divisors (see below), whose sum is σ = 74161272. Its totient is φ = 37080632.

The previous prime is 55620949. The next prime is 55621019. The reversal of 55620951 is 15902655.

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 55620951 - 2¹ = 55620949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55620931) 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, 9270156 + ... + 9270161.

It is an arithmetic number, because the mean of its divisors is an integer number (18540318).

Almost surely, 2^55620951 is an apocalyptic number.

55620951 is a deficient number, since it is larger than the sum of its proper divisors (18540321).

55620951 is a wasteful number, since it uses less digits than its factorization.

55620951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18540320.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 55620951 is about 7457.9454945715. The cubic root of 55620951 is about 381.7210736708.

The spelling of 55620951 in words is "fifty-five million, six hundred twenty thousand, nine hundred fifty-one".