155731464 has 128 divisors (see below), whose sum is σ = 498892800. Its totient is φ = 44089920.

The previous prime is 155731403. The next prime is 155731487. The reversal of 155731464 is 464137551.

155731464 is a `hidden beast` number, since 15 + 573 + 14 + 64 = 666.

It is a super-3 number, since 3×155731464³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191619 + ... + 192429.

It is an arithmetic number, because the mean of its divisors is an integer number (3897600).

Almost surely, 2^155731464 is an apocalyptic number.

155731464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155731464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249446400).

155731464 is an abundant number, since it is smaller than the sum of its proper divisors (343161336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155731464 is a wasteful number, since it uses less digits than its factorization.

155731464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 950 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 155731464 is about 12479.2413230933. The cubic root of 155731464 is about 538.0121978228.

The spelling of 155731464 in words is "one hundred fifty-five million, seven hundred thirty-one thousand, four hundred sixty-four".