55351956 has 48 divisors (see below), whose sum is σ = 142248960. Its totient is φ = 16612320.

The previous prime is 55351943. The next prime is 55351969. The reversal of 55351956 is 65915355.

It is an interprime number because it is at equal distance from previous prime (55351943) and next prime (55351969).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12165 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^55351956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55351956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71124480).

55351956 is an abundant number, since it is smaller than the sum of its proper divisors (86897004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55351956 is a wasteful number, since it uses less digits than its factorization.

55351956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044 (or 4042 counting only the distinct ones).

The product of its digits is 101250, while the sum is 39.

The square root of 55351956 is about 7439.8895153087. The cubic root of 55351956 is about 381.1047169812.

The spelling of 55351956 in words is "fifty-five million, three hundred fifty-one thousand, nine hundred fifty-six".