72533057 has 4 divisors (see below), whose sum is σ = 72573696. Its totient is φ = 72492420.

The previous prime is 72533003. The next prime is 72533077. The reversal of 72533057 is 75033527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72533057 - 2¹² = 72528961 is a prime.

It is a super-2 number, since 2×72533057² = 10522088715530498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72533077) 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, 17513 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (18143424).

Almost surely, 2^72533057 is an apocalyptic number.

It is an amenable number.

72533057 is a deficient number, since it is larger than the sum of its proper divisors (40639).

72533057 is a wasteful number, since it uses less digits than its factorization.

72533057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40638.

The product of its (nonzero) digits is 22050, while the sum is 32.

The square root of 72533057 is about 8516.6341356195. The cubic root of 72533057 is about 417.0409109760.

The spelling of 72533057 in words is "seventy-two million, five hundred thirty-three thousand, fifty-seven".