55651974 has 16 divisors (see below), whose sum is σ = 127204608. Its totient is φ = 15900552.

The previous prime is 55651963. The next prime is 55651979. The reversal of 55651974 is 47915655.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1325047 = 55651974 / (5 + 5 + 6 + 5 + 1 + 9 + 7 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662482 + ... + 662565.

It is an arithmetic number, because the mean of its divisors is an integer number (7950288).

Almost surely, 2^55651974 is an apocalyptic number.

55651974 is an abundant number, since it is smaller than the sum of its proper divisors (71552634).

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

55651974 is a wasteful number, since it uses less digits than its factorization.

55651974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325059.

The product of its digits is 189000, while the sum is 42.

The square root of 55651974 is about 7460.0250669820. The cubic root of 55651974 is about 381.7920297384.

The spelling of 55651974 in words is "fifty-five million, six hundred fifty-one thousand, nine hundred seventy-four".