631140545 has 8 divisors (see below), whose sum is σ = 865564224. Its totient is φ = 432782064.

The previous prime is 631140527. The next prime is 631140551. The reversal of 631140545 is 545041136.

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 631140545 - 2¹⁴ = 631124161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9016259 + ... + 9016328.

It is an arithmetic number, because the mean of its divisors is an integer number (108195528).

Almost surely, 2^631140545 is an apocalyptic number.

It is an amenable number.

631140545 is a deficient number, since it is larger than the sum of its proper divisors (234423679).

631140545 is a wasteful number, since it uses less digits than its factorization.

631140545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18032599.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 631140545 is about 25122.5107224577. The cubic root of 631140545 is about 857.7789021571.

The spelling of 631140545 in words is "six hundred thirty-one million, one hundred forty thousand, five hundred forty-five".