51398156 has 6 divisors (see below), whose sum is σ = 89946780. Its totient is φ = 25699076.

The previous prime is 51398147. The next prime is 51398159. The reversal of 51398156 is 65189315.

It is not an unprimeable number, because it can be changed into a prime (51398159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6424766 + ... + 6424773.

It is an arithmetic number, because the mean of its divisors is an integer number (14991130).

Almost surely, 2^51398156 is an apocalyptic number.

It is an amenable number.

51398156 is a deficient number, since it is larger than the sum of its proper divisors (38548624).

51398156 is a wasteful number, since it uses less digits than its factorization.

51398156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12849543 (or 12849541 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 51398156 is about 7169.2507279352. The cubic root of 51398156 is about 371.8055309917.

The spelling of 51398156 in words is "fifty-one million, three hundred ninety-eight thousand, one hundred fifty-six".