76216631 has 4 divisors (see below), whose sum is σ = 78675264. Its totient is φ = 73758000.

The previous prime is 76216573. The next prime is 76216639. The reversal of 76216631 is 13661267.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76216631 is a prime.

It is a super-2 number, since 2×76216631² = 11617949681980322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76216639) 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, 1229270 + ... + 1229331.

It is an arithmetic number, because the mean of its divisors is an integer number (19668816).

Almost surely, 2^76216631 is an apocalyptic number.

76216631 is a deficient number, since it is larger than the sum of its proper divisors (2458633).

76216631 is a wasteful number, since it uses less digits than its factorization.

76216631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458632.

The product of its digits is 9072, while the sum is 32.

The square root of 76216631 is about 8730.2136858155. The cubic root of 76216631 is about 423.9844374702.

Adding to 76216631 its reverse (13661267), we get a palindrome (89877898).

The spelling of 76216631 in words is "seventy-six million, two hundred sixteen thousand, six hundred thirty-one".