55074747 has 32 divisors (see below), whose sum is σ = 95703552. Its totient is φ = 27339264.

The previous prime is 55074739. The next prime is 55074769. The reversal of 55074747 is 74747055.

It is not a de Polignac number, because 55074747 - 2³ = 55074739 is a prime.

It is a super-2 number, since 2×55074747² = 6066455514228018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (55074727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1293 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (2990736).

Almost surely, 2^55074747 is an apocalyptic number.

55074747 is a deficient number, since it is larger than the sum of its proper divisors (40628805).

55074747 is a wasteful number, since it uses less digits than its factorization.

55074747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907.

The product of its (nonzero) digits is 137200, while the sum is 39.

The square root of 55074747 is about 7421.2362177740. The cubic root of 55074747 is about 380.4674464469.

The spelling of 55074747 in words is "fifty-five million, seventy-four thousand, seven hundred forty-seven".