51901967 has 16 divisors (see below), whose sum is σ = 59700480. Its totient is φ = 44755200.

The previous prime is 51901963. The next prime is 51901987. The reversal of 51901967 is 76910915.

It is a cyclic number.

It is not a de Polignac number, because 51901967 - 2² = 51901963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51901967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51901963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9467 + ... + 13907.

It is an arithmetic number, because the mean of its divisors is an integer number (3731280).

Almost surely, 2^51901967 is an apocalyptic number.

51901967 is a deficient number, since it is larger than the sum of its proper divisors (7798513).

51901967 is a wasteful number, since it uses less digits than its factorization.

51901967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 51901967 is about 7204.3019786791. The cubic root of 51901967 is about 373.0164109055.

The spelling of 51901967 in words is "fifty-one million, nine hundred one thousand, nine hundred sixty-seven".