149631517931 has 8 divisors (see below), whose sum is σ = 180007841280. Its totient is φ = 121505292648.

The previous prime is 149631517921. The next prime is 149631517939. The reversal of 149631517931 is 139715136941.

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 149631517931 - 2²² = 149627323627 is a prime.

It is a super-2 number, since 2×149631517931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149631517931.

It is not an unprimeable number, because it can be changed into a prime (149631517939) 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, 562524371 + ... + 562524636.

It is an arithmetic number, because the mean of its divisors is an integer number (22500980160).

Almost surely, 2^149631517931 is an apocalyptic number.

149631517931 is a deficient number, since it is larger than the sum of its proper divisors (30376323349).

149631517931 is a wasteful number, since it uses less digits than its factorization.

149631517931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125049033.

The product of its digits is 612360, while the sum is 50.

The spelling of 149631517931 in words is "one hundred forty-nine billion, six hundred thirty-one million, five hundred seventeen thousand, nine hundred thirty-one".