51531542 has 8 divisors (see below), whose sum is σ = 78276000. Its totient is φ = 25439544.

The previous prime is 51531533. The next prime is 51531551. The reversal of 51531542 is 24513515.

It is an interprime number because it is at equal distance from previous prime (51531533) and next prime (51531551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162917 + ... + 163232.

It is an arithmetic number, because the mean of its divisors is an integer number (9784500).

Almost surely, 2^51531542 is an apocalyptic number.

51531542 is a deficient number, since it is larger than the sum of its proper divisors (26744458).

51531542 is a wasteful number, since it uses less digits than its factorization.

51531542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326230.

The product of its digits is 3000, while the sum is 26.

The square root of 51531542 is about 7178.5473460861. The cubic root of 51531542 is about 372.1268837220.

The spelling of 51531542 in words is "fifty-one million, five hundred thirty-one thousand, five hundred forty-two".