55515415 has 8 divisors (see below), whose sum is σ = 66987648. Its totient is φ = 44166240.

The previous prime is 55515403. The next prime is 55515419. The reversal of 55515415 is 51451555.

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

It is a de Polignac number, because none of the positive numbers 2^k-55515415 is a prime.

It is a super-2 number, since 2×55515415² = 6163922605244450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515419) 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, 29767 + ... + 31576.

It is an arithmetic number, because the mean of its divisors is an integer number (8373456).

Almost surely, 2^55515415 is an apocalyptic number.

55515415 is a deficient number, since it is larger than the sum of its proper divisors (11472233).

55515415 is a wasteful number, since it uses less digits than its factorization.

55515415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61529.

The product of its digits is 12500, while the sum is 31.

The square root of 55515415 is about 7450.8667281062. The cubic root of 55515415 is about 381.4794931110.

The spelling of 55515415 in words is "fifty-five million, five hundred fifteen thousand, four hundred fifteen".