72051413 has 6 divisors (see below), whose sum is σ = 83814966. Its totient is φ = 61758312.

The previous prime is 72051383. The next prime is 72051437. The reversal of 72051413 is 31415027.

It can be written as a sum of positive squares in only one way, i.e., 60808804 + 11242609 = 7798^2 + 3353^2 .

It is not a de Polignac number, because 72051413 - 2¹⁶ = 71985877 is a prime.

It is a super-2 number, since 2×72051413² = 10382812230593138, 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 (72051493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 735170 + ... + 735267.

It is an arithmetic number, because the mean of its divisors is an integer number (13969161).

Almost surely, 2^72051413 is an apocalyptic number.

It is an amenable number.

72051413 is a deficient number, since it is larger than the sum of its proper divisors (11763553).

72051413 is a wasteful number, since it uses less digits than its factorization.

72051413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470451 (or 1470444 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72051413 is about 8488.3103736845. The cubic root of 72051413 is about 416.1157626703.

The spelling of 72051413 in words is "seventy-two million, fifty-one thousand, four hundred thirteen".