70540031 has 4 divisors (see below), whose sum is σ = 70577352. Its totient is φ = 70502712.

The previous prime is 70540013. The next prime is 70540033. The reversal of 70540031 is 13004507.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13004507 = 17 ⋅764971.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70540031 is a prime.

It is a super-2 number, since 2×70540031² = 9951791946961922, 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 = 70539985 and 70540012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70540033) 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, 15665 + ... + 19658.

It is an arithmetic number, because the mean of its divisors is an integer number (17644338).

Almost surely, 2^70540031 is an apocalyptic number.

70540031 is a deficient number, since it is larger than the sum of its proper divisors (37321).

70540031 is a wasteful number, since it uses less digits than its factorization.

70540031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37320.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 70540031 is about 8398.8112849379. The cubic root of 70540031 is about 413.1856361096.

Adding to 70540031 its reverse (13004507), we get a palindrome (83544538).

The spelling of 70540031 in words is "seventy million, five hundred forty thousand, thirty-one".