51438051 has 32 divisors (see below), whose sum is σ = 90885120. Its totient is φ = 28112832.

The previous prime is 51438047. The next prime is 51438053. The reversal of 51438051 is 15083415.

It is not a de Polignac number, because 51438051 - 2² = 51438047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51438053) 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, 1570 + ... + 10263.

It is an arithmetic number, because the mean of its divisors is an integer number (2840160).

Almost surely, 2^51438051 is an apocalyptic number.

51438051 is a deficient number, since it is larger than the sum of its proper divisors (39447069).

51438051 is a wasteful number, since it uses less digits than its factorization.

51438051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11872 (or 11866 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51438051 is about 7172.0325570929. The cubic root of 51438051 is about 371.9017039977.

The spelling of 51438051 in words is "fifty-one million, four hundred thirty-eight thousand, fifty-one".