55615751 has 4 divisors (see below), whose sum is σ = 56166504. Its totient is φ = 55065000.

The previous prime is 55615739. The next prime is 55615753. The reversal of 55615751 is 15751655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15751655 = 5 ⋅3150331.

It is a cyclic number.

It is not a de Polignac number, because 55615751 - 2¹⁸ = 55353607 is a prime.

It is a super-2 number, since 2×55615751² = 6186223518588002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275225 + ... + 275426.

It is an arithmetic number, because the mean of its divisors is an integer number (14041626).

Almost surely, 2^55615751 is an apocalyptic number.

55615751 is a deficient number, since it is larger than the sum of its proper divisors (550753).

55615751 is a wasteful number, since it uses less digits than its factorization.

55615751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550752.

The product of its digits is 26250, while the sum is 35.

The square root of 55615751 is about 7457.5968649425. The cubic root of 55615751 is about 381.7091776052.

The spelling of 55615751 in words is "fifty-five million, six hundred fifteen thousand, seven hundred fifty-one".