70231881 has 16 divisors (see below), whose sum is σ = 97148160. Its totient is φ = 45077760.

The previous prime is 70231877. The next prime is 70231901. The reversal of 70231881 is 18813207.

It is a happy number.

It is not a de Polignac number, because 70231881 - 2² = 70231877 is a prime.

It is a super-2 number, since 2×70231881² = 9865034217596322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70231831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36561 + ... + 38433.

It is an arithmetic number, because the mean of its divisors is an integer number (6071760).

Almost surely, 2^70231881 is an apocalyptic number.

It is an amenable number.

70231881 is a deficient number, since it is larger than the sum of its proper divisors (26916279).

70231881 is a wasteful number, since it uses less digits than its factorization.

70231881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 70231881 is about 8380.4463484948. The cubic root of 70231881 is about 412.5830987773.

The spelling of 70231881 in words is "seventy million, two hundred thirty-one thousand, eight hundred eighty-one".