51515454 has 16 divisors (see below), whose sum is σ = 104052240. Its totient is φ = 17001600.

The previous prime is 51515447. The next prime is 51515461. The reversal of 51515454 is 45451515.

It is an interprime number because it is at equal distance from previous prime (51515447) and next prime (51515461).

It is a super-2 number, since 2×51515454² = 5307684001652232, which contains 22 as substring.

It is a congruent number.

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, 41899 + ... + 43110.

It is an arithmetic number, because the mean of its divisors is an integer number (6503265).

Almost surely, 2^51515454 is an apocalyptic number.

51515454 is an abundant number, since it is smaller than the sum of its proper divisors (52536786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51515454 is a wasteful number, since it uses less digits than its factorization.

51515454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85115.

The product of its digits is 10000, while the sum is 30.

The square root of 51515454 is about 7177.4266976403. The cubic root of 51515454 is about 372.0881540417.

Adding to 51515454 its reverse (45451515), we get a palindrome (96966969).

The spelling of 51515454 in words is "fifty-one million, five hundred fifteen thousand, four hundred fifty-four".