149555631 has 8 divisors (see below), whose sum is σ = 209902720. Its totient is φ = 94456152.

The previous prime is 149555617. The next prime is 149555633. The reversal of 149555631 is 136555941.

It is a happy number.

149555631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149555631 - 2⁷ = 149555503 is a prime.

It is a super-2 number, since 2×149555631² = 44733773527616322, which 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 149555631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149555633) 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, 1311835 + ... + 1311948.

It is an arithmetic number, because the mean of its divisors is an integer number (26237840).

Almost surely, 2^149555631 is an apocalyptic number.

149555631 is a deficient number, since it is larger than the sum of its proper divisors (60347089).

149555631 is a wasteful number, since it uses less digits than its factorization.

149555631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623805.

The product of its digits is 81000, while the sum is 39.

The square root of 149555631 is about 12229.2939698087. The cubic root of 149555631 is about 530.8040850377.

The spelling of 149555631 in words is "one hundred forty-nine million, five hundred fifty-five thousand, six hundred thirty-one".