51949156 has 12 divisors (see below), whose sum is σ = 103898368. Its totient is φ = 22263912.

The previous prime is 51949153. The next prime is 51949159. The reversal of 51949156 is 65194915.

It is an interprime number because it is at equal distance from previous prime (51949153) and next prime (51949159).

51949156 is an admirable number.

It is a super-2 number, since 2×51949156² = 5397429618224672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51949153) 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, 927636 + ... + 927691.

Almost surely, 2^51949156 is an apocalyptic number.

It is an amenable number.

51949156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51949156 is a wasteful number, since it uses less digits than its factorization.

51949156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855338 (or 1855336 counting only the distinct ones).

The product of its digits is 48600, while the sum is 40.

The square root of 51949156 is about 7207.5762916531. The cubic root of 51949156 is about 373.1294248592.

The spelling of 51949156 in words is "fifty-one million, nine hundred forty-nine thousand, one hundred fifty-six".