70372031 has 4 divisors (see below), whose sum is σ = 72088464. Its totient is φ = 68655600.

The previous prime is 70371989. The next prime is 70372051. The reversal of 70372031 is 13027307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13027307 = 193 ⋅67499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70372031 is a prime.

It is a super-2 number, since 2×70372031² = 9904445494129922, 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 = 70371988 and 70372006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70372051) 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, 858155 + ... + 858236.

It is an arithmetic number, because the mean of its divisors is an integer number (18022116).

Almost surely, 2^70372031 is an apocalyptic number.

70372031 is a deficient number, since it is larger than the sum of its proper divisors (1716433).

70372031 is a wasteful number, since it uses less digits than its factorization.

70372031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716432.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 70372031 is about 8388.8039075902. The cubic root of 70372031 is about 412.8573574196.

Adding to 70372031 its reverse (13027307), we get a palindrome (83399338).

The spelling of 70372031 in words is "seventy million, three hundred seventy-two thousand, thirty-one".