51861454 has 16 divisors (see below), whose sum is σ = 81997920. Its totient is φ = 24562720.

The previous prime is 51861451. The next prime is 51861493. The reversal of 51861454 is 45416815.

It is a super-2 number, since 2×51861454² = 5379220821988232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51861451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5362 + ... + 11509.

It is an arithmetic number, because the mean of its divisors is an integer number (5124870).

Almost surely, 2^51861454 is an apocalyptic number.

51861454 is a deficient number, since it is larger than the sum of its proper divisors (30136466).

51861454 is a wasteful number, since it uses less digits than its factorization.

51861454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16955.

The product of its digits is 19200, while the sum is 34.

The square root of 51861454 is about 7201.4897069981. The cubic root of 51861454 is about 372.9193307856.

The spelling of 51861454 in words is "fifty-one million, eight hundred sixty-one thousand, four hundred fifty-four".