75131951 has 4 divisors (see below), whose sum is σ = 75525504. Its totient is φ = 74738400.

The previous prime is 75131929. The next prime is 75131983. The reversal of 75131951 is 15913157.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15913157 = 13 ⋅1224089.

It is a cyclic number.

It is not a de Polignac number, because 75131951 - 2⁶ = 75131887 is a prime.

It is a super-2 number, since 2×75131951² = 11289620122132802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75131911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196490 + ... + 196871.

It is an arithmetic number, because the mean of its divisors is an integer number (18881376).

Almost surely, 2^75131951 is an apocalyptic number.

75131951 is a deficient number, since it is larger than the sum of its proper divisors (393553).

75131951 is a wasteful number, since it uses less digits than its factorization.

75131951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393552.

The product of its digits is 4725, while the sum is 32.

The square root of 75131951 is about 8667.8688845644. The cubic root of 75131951 is about 421.9635028295.

The spelling of 75131951 in words is "seventy-five million, one hundred thirty-one thousand, nine hundred fifty-one".