70336431 has 20 divisors (see below), whose sum is σ = 114623784. Its totient is φ = 42627600.

The previous prime is 70336417. The next prime is 70336447. The reversal of 70336431 is 13463307.

It is a happy number.

It is not a de Polignac number, because 70336431 - 2¹⁰ = 70335407 is a prime.

It is a super-2 number, since 2×70336431² = 9894427051635522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 70336395 and 70336404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70336831) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38580 + ... + 40361.

Almost surely, 2^70336431 is an apocalyptic number.

70336431 is a deficient number, since it is larger than the sum of its proper divisors (44287353).

70336431 is a wasteful number, since it uses less digits than its factorization.

70336431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78964 (or 78955 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 70336431 is about 8386.6817633674. The cubic root of 70336431 is about 412.7877265314.

Adding to 70336431 its reverse (13463307), we get a palindrome (83799738).

The spelling of 70336431 in words is "seventy million, three hundred thirty-six thousand, four hundred thirty-one".