70538131 has 4 divisors (see below), whose sum is σ = 71388072. Its totient is φ = 69688192.

The previous prime is 70538123. The next prime is 70538159. The reversal of 70538131 is 13183507.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13183507 = 37 ⋅356311.

It is a cyclic number.

It is not a de Polignac number, because 70538131 - 2³ = 70538123 is a prime.

It is a super-2 number, since 2×70538131² = 9951255849946322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70538131.

It is not an unprimeable number, because it can be changed into a prime (70538101) 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, 424846 + ... + 425011.

It is an arithmetic number, because the mean of its divisors is an integer number (17847018).

Almost surely, 2^70538131 is an apocalyptic number.

70538131 is a deficient number, since it is larger than the sum of its proper divisors (849941).

70538131 is an equidigital number, since it uses as much as digits as its factorization.

70538131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849940.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 70538131 is about 8398.6981729313. The cubic root of 70538131 is about 413.1819263496.

The spelling of 70538131 in words is "seventy million, five hundred thirty-eight thousand, one hundred thirty-one".