51224961 has 12 divisors (see below), whose sum is σ = 72555152. Its totient is φ = 32140608.

The previous prime is 51224951. The next prime is 51224963. The reversal of 51224961 is 16942215.

It is not a de Polignac number, because 51224961 - 2¹⁸ = 50962817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51224963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28675 + ... + 30408.

Almost surely, 2^51224961 is an apocalyptic number.

51224961 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51224961 is a deficient number, since it is larger than the sum of its proper divisors (21330191).

51224961 is a wasteful number, since it uses less digits than its factorization.

51224961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59120 (or 59103 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 51224961 is about 7157.1615183675. The cubic root of 51224961 is about 371.3874399579.

The spelling of 51224961 in words is "fifty-one million, two hundred twenty-four thousand, nine hundred sixty-one".