77213525 has 12 divisors (see below), whose sum is σ = 96062304. Its totient is φ = 61566000.

The previous prime is 77213471. The next prime is 77213531. The reversal of 77213525 is 52531277.

It is not a de Polignac number, because 77213525 - 2¹⁰ = 77212501 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77213491 and 77213500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2810 + ... + 12740.

It is an arithmetic number, because the mean of its divisors is an integer number (8005192).

Almost surely, 2^77213525 is an apocalyptic number.

It is an amenable number.

77213525 is a deficient number, since it is larger than the sum of its proper divisors (18848779).

77213525 is a wasteful number, since it uses less digits than its factorization.

77213525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252 (or 10247 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 77213525 is about 8787.1226803772. The cubic root of 77213525 is about 425.8249719965.

The spelling of 77213525 in words is "seventy-seven million, two hundred thirteen thousand, five hundred twenty-five".