72377251 has 18 divisors (see below), whose sum is σ = 80063340. Its totient is φ = 65413656.

The previous prime is 72377191. The next prime is 72377257. The reversal of 72377251 is 15277327.

It is a happy number.

It is not a de Polignac number, because 72377251 - 2⁹ = 72376739 is a prime.

It is a hoax number, since the sum of its digits (34) 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 (72377257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 190780 + ... + 191158.

Almost surely, 2^72377251 is an apocalyptic number.

72377251 is a deficient number, since it is larger than the sum of its proper divisors (7686089).

72377251 is a wasteful number, since it uses less digits than its factorization.

72377251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 421 counting only the distinct ones).

The product of its digits is 20580, while the sum is 34.

The square root of 72377251 is about 8507.4820599282. The cubic root of 72377251 is about 416.7420860456.

The spelling of 72377251 in words is "seventy-two million, three hundred seventy-seven thousand, two hundred fifty-one".