51557102 has 4 divisors (see below), whose sum is σ = 77335656. Its totient is φ = 25778550.

The previous prime is 51557087. The next prime is 51557111. The reversal of 51557102 is 20175515.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12889274 + ... + 12889277.

It is an arithmetic number, because the mean of its divisors is an integer number (19333914).

Almost surely, 2^51557102 is an apocalyptic number.

51557102 is a deficient number, since it is larger than the sum of its proper divisors (25778554).

51557102 is a wasteful number, since it uses less digits than its factorization.

51557102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25778553.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 51557102 is about 7180.3274298600. The cubic root of 51557102 is about 372.1883993854.

The spelling of 51557102 in words is "fifty-one million, five hundred fifty-seven thousand, one hundred two".