55742274 has 24 divisors (see below), whose sum is σ = 138028800. Its totient is φ = 15926328.

The previous prime is 55742249. The next prime is 55742287. The reversal of 55742274 is 47224755.

It is a happy number.

It is a super-2 number, since 2×55742274² = 6214402221382152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221074 + ... + 221325.

It is an arithmetic number, because the mean of its divisors is an integer number (5751200).

Almost surely, 2^55742274 is an apocalyptic number.

55742274 is an abundant number, since it is smaller than the sum of its proper divisors (82286526).

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

55742274 is a wasteful number, since it uses less digits than its factorization.

55742274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442414 (or 442411 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 55742274 is about 7466.0748723811. The cubic root of 55742274 is about 381.9984146933.

The spelling of 55742274 in words is "fifty-five million, seven hundred forty-two thousand, two hundred seventy-four".