72250357 has 4 divisors (see below), whose sum is σ = 76500396. Its totient is φ = 68000320.

The previous prime is 72250309. The next prime is 72250361. The reversal of 72250357 is 75305227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32421636 + 39828721 = 5694^2 + 6311^2 .

It is a cyclic number.

It is not a de Polignac number, because 72250357 - 2⁷ = 72250229 is a prime.

It is a super-2 number, since 2×72250357² = 10440228173254898, 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 (72250457) 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, 2124994 + ... + 2125027.

It is an arithmetic number, because the mean of its divisors is an integer number (19125099).

Almost surely, 2^72250357 is an apocalyptic number.

It is an amenable number.

72250357 is a deficient number, since it is larger than the sum of its proper divisors (4250039).

72250357 is a wasteful number, since it uses less digits than its factorization.

72250357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250038.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 72250357 is about 8500.0209999741. The cubic root of 72250357 is about 416.4983952703.

The spelling of 72250357 in words is "seventy-two million, two hundred fifty thousand, three hundred fifty-seven".