125053551 has 20 divisors (see below), whose sum is σ = 213496272. Its totient is φ = 71458848.

The previous prime is 125053543. The next prime is 125053559. The reversal of 125053551 is 155350521.

125053551 is a `hidden beast` number, since 12 + 50 + 53 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (125053543) and next prime (125053559).

It is not a de Polignac number, because 125053551 - 2³ = 125053543 is a prime.

It is a super-4 number, since 4×125053551⁴ (a number of 33 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125053559) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109710 + ... + 110843.

Almost surely, 2^125053551 is an apocalyptic number.

125053551 is a deficient number, since it is larger than the sum of its proper divisors (88442721).

125053551 is an equidigital number, since it uses as much as digits as its factorization.

125053551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220572 (or 220563 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 125053551 is about 11182.7345045834. The cubic root of 125053551 is about 500.0713911395.

The spelling of 125053551 in words is "one hundred twenty-five million, fifty-three thousand, five hundred fifty-one".