51531434 has 12 divisors (see below), whose sum is σ = 80057094. Its totient is φ = 24876432.

The previous prime is 51531433. The next prime is 51531451. The reversal of 51531434 is 43413515.

It can be written as a sum of positive squares in 3 ways, for example, as 51165409 + 366025 = 7153^2 + 605^2 .

It is not an unprimeable number, because it can be changed into a prime (51531433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13637 + ... + 17000.

Almost surely, 2^51531434 is an apocalyptic number.

51531434 is a deficient number, since it is larger than the sum of its proper divisors (28525660).

51531434 is a wasteful number, since it uses less digits than its factorization.

51531434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30697 (or 30668 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 51531434 is about 7178.5398236689. The cubic root of 51531434 is about 372.1266237535.

Adding to 51531434 its reverse (43413515), we get a palindrome (94944949).

The spelling of 51531434 in words is "fifty-one million, five hundred thirty-one thousand, four hundred thirty-four".