42402120431 has 16 divisors (see below), whose sum is σ = 48706344960. Its totient is φ = 36507386880.

The previous prime is 42402120401. The next prime is 42402120461. The reversal of 42402120431 is 13402120424.

It is an interprime number because it is at equal distance from previous prime (42402120401) and next prime (42402120461).

It is a cyclic number.

It is not a de Polignac number, because 42402120431 - 2⁶ = 42402120367 is a prime.

It is a super-2 number, since 2×42402120431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42402120397 and 42402120406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402120401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693170 + ... + 751856.

It is an arithmetic number, because the mean of its divisors is an integer number (3044146560).

Almost surely, 2^42402120431 is an apocalyptic number.

42402120431 is a deficient number, since it is larger than the sum of its proper divisors (6304224529).

42402120431 is a wasteful number, since it uses less digits than its factorization.

42402120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62174.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42402120431 its reverse (13402120424), we get a palindrome (55804240855).

The spelling of 42402120431 in words is "forty-two billion, four hundred two million, one hundred twenty thousand, four hundred thirty-one".