55997402 has 8 divisors (see below), whose sum is σ = 84029076. Its totient is φ = 27987712.

The previous prime is 55997393. The next prime is 55997407. The reversal of 55997402 is 20479955.

It can be written as a sum of positive squares in 2 ways, for example, as 55965361 + 32041 = 7481^2 + 179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55997402.

It is not an unprimeable number, because it can be changed into a prime (55997407) 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, 4538 + ... + 11514.

Almost surely, 2^55997402 is an apocalyptic number.

55997402 is a deficient number, since it is larger than the sum of its proper divisors (28031674).

55997402 is a wasteful number, since it uses less digits than its factorization.

55997402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 55997402 is about 7483.1411853579. The cubic root of 55997402 is about 382.5803200401.

The spelling of 55997402 in words is "fifty-five million, nine hundred ninety-seven thousand, four hundred two".