245123631 has 32 divisors (see below), whose sum is σ = 385867200. Its totient is φ = 153498240.

The previous prime is 245123591. The next prime is 245123633. The reversal of 245123631 is 136321542.

245123631 is a `hidden beast` number, since 2 + 4 + 5 + 1 + 23 + 631 = 666.

It is not a de Polignac number, because 245123631 - 2²² = 240929327 is a prime.

It is a super-2 number, since 2×245123631² = 120171188949248322, which contains 22 as substring.

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

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 245123595 and 245123604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245123633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24741 + ... + 33201.

It is an arithmetic number, because the mean of its divisors is an integer number (12058350).

Almost surely, 2^245123631 is an apocalyptic number.

245123631 is a deficient number, since it is larger than the sum of its proper divisors (140743569).

245123631 is a wasteful number, since it uses less digits than its factorization.

245123631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536 (or 8530 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 245123631 is about 15656.4245918409. The cubic root of 245123631 is about 625.8377084762.

The spelling of 245123631 in words is "two hundred forty-five million, one hundred twenty-three thousand, six hundred thirty-one".