145556631 has 48 divisors (see below), whose sum is σ = 239016960. Its totient is φ = 84576960.

The previous prime is 145556623. The next prime is 145556633. The reversal of 145556631 is 136655541.

145556631 is a `hidden beast` number, since 1 + 45 + 556 + 63 + 1 = 666.

It is not a de Polignac number, because 145556631 - 2³ = 145556623 is a prime.

It is a super-2 number, since 2×145556631² = 42373465656140322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145556633) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289126 + ... + 289628.

It is an arithmetic number, because the mean of its divisors is an integer number (4979520).

Almost surely, 2^145556631 is an apocalyptic number.

145556631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145556631 is a deficient number, since it is larger than the sum of its proper divisors (93460329).

145556631 is a wasteful number, since it uses less digits than its factorization.

145556631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 633 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 145556631 is about 12064.6852839185. The cubic root of 145556631 is about 526.0301839966.

The spelling of 145556631 in words is "one hundred forty-five million, five hundred fifty-six thousand, six hundred thirty-one".