149553831 has 32 divisors (see below), whose sum is σ = 235008000. Its totient is φ = 84554400.

The previous prime is 149553823. The next prime is 149553857. The reversal of 149553831 is 138355941.

It is not a de Polignac number, because 149553831 - 2³ = 149553823 is a prime.

It is a super-2 number, since 2×149553831² = 44732696733553122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149553831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149555831) 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, 103210 + ... + 104648.

It is an arithmetic number, because the mean of its divisors is an integer number (7344000).

Almost surely, 2^149553831 is an apocalyptic number.

149553831 is a deficient number, since it is larger than the sum of its proper divisors (85454169).

149553831 is a wasteful number, since it uses less digits than its factorization.

149553831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1550 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 149553831 is about 12229.2203758048. The cubic root of 149553831 is about 530.8019555042.

The spelling of 149553831 in words is "one hundred forty-nine million, five hundred fifty-three thousand, eight hundred thirty-one".