70311431 has 8 divisors (see below), whose sum is σ = 71137440. Its totient is φ = 69488928.

The previous prime is 70311427. The next prime is 70311487. The reversal of 70311431 is 13411307.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70311431 - 2² = 70311427 is a prime.

It is a super-2 number, since 2×70311431² = 9887394658535522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70311401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70025 + ... + 71021.

It is an arithmetic number, because the mean of its divisors is an integer number (8892180).

Almost surely, 2^70311431 is an apocalyptic number.

70311431 is a deficient number, since it is larger than the sum of its proper divisors (826009).

70311431 is a wasteful number, since it uses less digits than its factorization.

70311431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 70311431 is about 8385.1911725375. The cubic root of 70311431 is about 412.7388143915.

Adding to 70311431 its reverse (13411307), we get a palindrome (83722738).

The spelling of 70311431 in words is "seventy million, three hundred eleven thousand, four hundred thirty-one".