245001631 has 4 divisors (see below), whose sum is σ = 280001872. Its totient is φ = 210001392.

The previous prime is 245001629. The next prime is 245001661. The reversal of 245001631 is 136100542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136100542 = 2 ⋅68050271.

It is a cyclic number.

It is not a de Polignac number, because 245001631 - 2¹ = 245001629 is a prime.

It is a super-2 number, since 2×245001631² = 120051598385320322, 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 (245001661) 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, 17500110 + ... + 17500123.

It is an arithmetic number, because the mean of its divisors is an integer number (70000468).

Almost surely, 2^245001631 is an apocalyptic number.

245001631 is a deficient number, since it is larger than the sum of its proper divisors (35000241).

245001631 is an equidigital number, since it uses as much as digits as its factorization.

245001631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35000240.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 245001631 is about 15652.5279427957. The cubic root of 245001631 is about 625.7338630947.

The spelling of 245001631 in words is "two hundred forty-five million, one thousand, six hundred thirty-one".