51135554 has 16 divisors (see below), whose sum is σ = 81321216. Its totient is φ = 24073200.

The previous prime is 51135529. The next prime is 51135563. The reversal of 51135554 is 45553115.

It is a super-2 number, since 2×51135554² = 5229689765773832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8852 + ... + 13439.

It is an arithmetic number, because the mean of its divisors is an integer number (5082576).

Almost surely, 2^51135554 is an apocalyptic number.

51135554 is a deficient number, since it is larger than the sum of its proper divisors (30185662).

51135554 is a wasteful number, since it uses less digits than its factorization.

51135554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22361.

The product of its digits is 7500, while the sum is 29.

The square root of 51135554 is about 7150.9128088657. The cubic root of 51135554 is about 371.1712434449.

Adding to 51135554 its reverse (45553115), we get a palindrome (96688669).

The spelling of 51135554 in words is "fifty-one million, one hundred thirty-five thousand, five hundred fifty-four".