70231251 has 4 divisors (see below), whose sum is σ = 93641672. Its totient is φ = 46820832.

The previous prime is 70231247. The next prime is 70231309. The reversal of 70231251 is 15213207.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70231251 - 2² = 70231247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70231751) 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, 11705206 + ... + 11705211.

It is an arithmetic number, because the mean of its divisors is an integer number (23410418).

Almost surely, 2^70231251 is an apocalyptic number.

70231251 is a deficient number, since it is larger than the sum of its proper divisors (23410421).

70231251 is a wasteful number, since it uses less digits than its factorization.

70231251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23410420.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 70231251 is about 8380.4087609138. The cubic root of 70231251 is about 412.5818651109.

Adding to 70231251 its reverse (15213207), we get a palindrome (85444458).

The spelling of 70231251 in words is "seventy million, two hundred thirty-one thousand, two hundred fifty-one".