55313428 has 12 divisors (see below), whose sum is σ = 99159732. Its totient is φ = 26982080.

The previous prime is 55313417. The next prime is 55313429. The reversal of 55313428 is 82431355.

It can be written as a sum of positive squares in 2 ways, for example, as 23639044 + 31674384 = 4862^2 + 5628^2 .

It is a super-2 number, since 2×55313428² = 6119150634222368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55313428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55313429) 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, 168475 + ... + 168802.

It is an arithmetic number, because the mean of its divisors is an integer number (8263311).

Almost surely, 2^55313428 is an apocalyptic number.

It is an amenable number.

55313428 is a deficient number, since it is larger than the sum of its proper divisors (43846304).

55313428 is a wasteful number, since it uses less digits than its factorization.

55313428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337322 (or 337320 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 55313428 is about 7437.2997788176. The cubic root of 55313428 is about 381.0162731893.

The spelling of 55313428 in words is "fifty-five million, three hundred thirteen thousand, four hundred twenty-eight".