55653213 has 32 divisors (see below), whose sum is σ = 93588480. Its totient is φ = 28575360.

The previous prime is 55653197. The next prime is 55653239. The reversal of 55653213 is 31235655.

It is not a de Polignac number, because 55653213 - 2⁴ = 55653197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55653263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19206 + ... + 21912.

It is an arithmetic number, because the mean of its divisors is an integer number (2924640).

Almost surely, 2^55653213 is an apocalyptic number.

It is an amenable number.

55653213 is a deficient number, since it is larger than the sum of its proper divisors (37935267).

55653213 is a wasteful number, since it uses less digits than its factorization.

55653213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817.

The product of its digits is 13500, while the sum is 30.

The square root of 55653213 is about 7460.1081091362. The cubic root of 55653213 is about 381.7948630420.

Adding to 55653213 its reverse (31235655), we get a palindrome (86888868).

It can be divided in two parts, 5565 and 3213, that added together give a palindrome (8778).

The spelling of 55653213 in words is "fifty-five million, six hundred fifty-three thousand, two hundred thirteen".