72277031 has 4 divisors (see below), whose sum is σ = 72415752. Its totient is φ = 72138312.

The previous prime is 72276983. The next prime is 72277067. The reversal of 72277031 is 13077227.

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

It is a cyclic number.

It is not a de Polignac number, because 72277031 - 2¹⁴ = 72260647 is a prime.

It is a super-2 number, since 2×72277031² = 10447938420349922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72276985 and 72277003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72270031) 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, 68576 + ... + 69621.

It is an arithmetic number, because the mean of its divisors is an integer number (18103938).

Almost surely, 2^72277031 is an apocalyptic number.

72277031 is a deficient number, since it is larger than the sum of its proper divisors (138721).

72277031 is a wasteful number, since it uses less digits than its factorization.

72277031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138720.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 72277031 is about 8501.5899101286. The cubic root of 72277031 is about 416.5496444348.

The spelling of 72277031 in words is "seventy-two million, two hundred seventy-seven thousand, thirty-one".