51155602 has 4 divisors (see below), whose sum is σ = 76733406. Its totient is φ = 25577800.

The previous prime is 51155579. The next prime is 51155617. The reversal of 51155602 is 20655115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30371121 + 20784481 = 5511^2 + 4559^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788899 + ... + 12788902.

Almost surely, 2^51155602 is an apocalyptic number.

51155602 is a deficient number, since it is larger than the sum of its proper divisors (25577804).

51155602 is a wasteful number, since it uses less digits than its factorization.

51155602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577803.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51155602 is about 7152.3144505817. The cubic root of 51155602 is about 371.2197437430.

The spelling of 51155602 in words is "fifty-one million, one hundred fifty-five thousand, six hundred two".