64474251 has 16 divisors (see below), whose sum is σ = 91967904. Its totient is φ = 40034304.

The previous prime is 64474247. The next prime is 64474261. The reversal of 64474251 is 15247446.

It is not a de Polignac number, because 64474251 - 2² = 64474247 is a prime.

It is a super-2 number, since 2×64474251² = 8313858084022002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64474211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1570 + ... + 11463.

It is an arithmetic number, because the mean of its divisors is an integer number (5747994).

Almost surely, 2^64474251 is an apocalyptic number.

64474251 is a deficient number, since it is larger than the sum of its proper divisors (27493653).

64474251 is a wasteful number, since it uses less digits than its factorization.

64474251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13150.

The product of its digits is 26880, while the sum is 33.

The square root of 64474251 is about 8029.5859793641. The cubic root of 64474251 is about 400.9855924409.

The spelling of 64474251 in words is "sixty-four million, four hundred seventy-four thousand, two hundred fifty-one".